Brake-beam.



W. S. 'ATWO0D.'

BRAKE BEAM.

Arrmon'non mum IAB. 1a, 1911.

1,036,055. Patented Aug. 20, 1912.

VVITNEESES .INVENTUH WILLIAM S.ATWDDIJ a channel, 13 t of same:

WILLIAM STEPHEN ATWOOD, OF

MONTREAL, QUEBEC, CANADA, ASSIGNOR TO CANA- DIAN CAR & FOUNDRY COMPANY, LIMITED, OF MONTREAL, CANADA.

BRAKE-BEAM.

T 0 all whom, it may concern:

lie it known that I, VVILLIAM STEPHEN A'1\voo1), of the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Brake-Beams, of which the following is a full, clear, and exact description.

This invention relates to improvements in brake beams, and the object is to provide a brake beam having tension and compression members of increased size, without interfering with the fixed dimensions which must be maintained to allow the use of brake eams in standard car trucks.

In the construction of brake beams, the usual method is to provide compression and tension members united at their ends by a sleeve or thrust block to form a very strong truss. The increasing weight and speed of trains have gradua l'y raised the strength requirements of brake beams so that 1t has become im ossible to use the increased size of brake eam on the standard car trucks. 1 r

This invention aims to provide a sleeve or thrust block of such design that thesize of compression and tension members may her to the sleeve.

In the drawings which illustrate my invent-ion, Figure 1 is a partial plan view of a brake beam. Fig. 2 is an endelevation Fig. 3 i. a sectional view of the sleeve on the line 6-7, Fig. 2. Fig. 4 is a transverse section of the beam on the line 8 9, Fig. 1. Fig. 5 is a similar view on theline l011, Fig. 1. I

Inthe drawings, 12 designates the compression member, preferably in the form of he tension member, and 14 the strut separating the two members at the center. A slee e or thrust block IQ is jacent the flanges of the compression member,

an oflset portion or lug strengthened bers 18 of the at 19 for th 17 is formed and by continuing the side m'emsleeve. This lug is apertured e passage of a nut 20 screwed on Specification of Letters Patent. Application filed March 13, 1911.

largely Increased, and also to provide a novel method of attaching the tension mem- Patented Aug. 20, 1912. Serial No. 613,983.

the end of the tension .member 13. The aperture 19 is slightly enlarged at 21 on the side adjacent the compression member, to facilitate the insertion or removal of the nut. The nut 20 is cylindrical where it passes through the aperture 19, and is provided at one end with a flange 22 which lies between the plates 18 and bears against the lug 17. The opposite end 23 of this nut, which projects through the lug 17, is polygonal in form for the reception of a wrench or spanner to tighten up the tension member. The aperture 24 in the strut 14 through which the tension member passes is preferably disposed at such a distance from the compression member 12 that the center line 25 of the tension member will pass through the intersection of the center hne 26 of the sleeve portion 16, and the center line 27 of as if the tension member extended entirely through the sleeve in the usual manner. The strut 141's provided with an aperture 28 for the attachment of the draw bar of the brake and with an aperture 29 for a suspension link. The portion with the brake he (1.

In assembling the parts, one of the sleeves 15 is fitted on the end of the compression member and the tension member passed through'the aperture 24 in the strut 14 and through the aperture 19 in the sleeve, the nut 20 being screwed on, and the tension bar and nut thrustinto the sleeve as far as they will go. The other sleeve is how applied to the opposite ends of the compression and teiision members and the nut screwed on to the end of the tension mem- The nuts are screwed up tight on each bers may be used than have been heretofore possible, resulting in a much stronger and heavier beam, without interfering in any 'way with the standard fixed dimensions.

Having thus described my invention, what I claim is A brake beam comprising a compression member, a sleeve fitted to each end thereof, and a tension member passing through said having an outer end portion of standard nuts, and adapted to be tightened thereby. 10 size adapted to receive a brake head, an In witness whereof I have hereunto set offset lug at the inner end of each sleeve my hand in the presence of two witnesses.

having an aperture therein, a nut passing WILLIAM STEPHEN ATWOOD. through said lug having a collar bearing Witnesses: against the outer side of the lug, and a polyg- STUART R. W. ALLEN,

onal' portionon the inner side of the lug, E. R. MCKENZIE. 

